Initial

Src/adc.c

@@ -0,0 +1,157 @@
+/**
+  ******************************************************************************
+  * File Name          : ADC.c
+  * Description        : This file provides code for the configuration
+  *                      of the ADC instances.
+  ******************************************************************************
+  *
+  * COPYRIGHT(c) 2016 STMicroelectronics
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "adc.h"
+
+#include "gpio.h"
+#include "dma.h"
+
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+ADC_HandleTypeDef hadc1;
+DMA_HandleTypeDef hdma_adc1;
+
+/* ADC1 init function */
+void MX_ADC1_Init(void)
+{
+  ADC_ChannelConfTypeDef sConfig;
+
+    /**Common config 
+    */
+  hadc1.Instance = ADC1;
+  hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
+  hadc1.Init.ContinuousConvMode = DISABLE;
+  hadc1.Init.DiscontinuousConvMode = DISABLE;
+  hadc1.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T3_TRGO;
+  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
+  hadc1.Init.NbrOfConversion = 1;
+  if (HAL_ADC_Init(&hadc1) != HAL_OK)
+  {
+    Error_Handler();
+  }
+
+    /**Configure Regular Channel 
+    */
+  sConfig.Channel = ADC_CHANNEL_9;
+  sConfig.Rank = 1;
+  sConfig.SamplingTime = ADC_SAMPLETIME_7CYCLES_5;
+  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
+  {
+    Error_Handler();
+  }
+
+}
+
+void HAL_ADC_MspInit(ADC_HandleTypeDef* adcHandle)
+{
+
+  GPIO_InitTypeDef GPIO_InitStruct;
+  if(adcHandle->Instance==ADC1)
+  {
+  /* USER CODE BEGIN ADC1_MspInit 0 */
+
+  /* USER CODE END ADC1_MspInit 0 */
+    /* Peripheral clock enable */
+    __HAL_RCC_ADC1_CLK_ENABLE();
+  
+    /**ADC1 GPIO Configuration    
+    PB1     ------> ADC1_IN9 
+    */
+    GPIO_InitStruct.Pin = AUDIO_IN_Pin;
+    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
+    HAL_GPIO_Init(AUDIO_IN_GPIO_Port, &GPIO_InitStruct);
+
+    /* Peripheral DMA init*/
+  
+    hdma_adc1.Instance = DMA1_Channel1;
+    hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY;
+    hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;
+    hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;
+    hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
+    hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
+    hdma_adc1.Init.Mode = DMA_NORMAL;
+    hdma_adc1.Init.Priority = DMA_PRIORITY_MEDIUM;
+    if (HAL_DMA_Init(&hdma_adc1) != HAL_OK)
+    {
+      Error_Handler();
+    }
+
+    __HAL_LINKDMA(adcHandle,DMA_Handle,hdma_adc1);
+
+  /* USER CODE BEGIN ADC1_MspInit 1 */
+
+  /* USER CODE END ADC1_MspInit 1 */
+  }
+}
+
+void HAL_ADC_MspDeInit(ADC_HandleTypeDef* adcHandle)
+{
+
+  if(adcHandle->Instance==ADC1)
+  {
+  /* USER CODE BEGIN ADC1_MspDeInit 0 */
+
+  /* USER CODE END ADC1_MspDeInit 0 */
+    /* Peripheral clock disable */
+    __HAL_RCC_ADC1_CLK_DISABLE();
+  
+    /**ADC1 GPIO Configuration    
+    PB1     ------> ADC1_IN9 
+    */
+    HAL_GPIO_DeInit(AUDIO_IN_GPIO_Port, AUDIO_IN_Pin);
+
+    /* Peripheral DMA DeInit*/
+    HAL_DMA_DeInit(adcHandle->DMA_Handle);
+  }
+  /* USER CODE BEGIN ADC1_MspDeInit 1 */
+
+  /* USER CODE END ADC1_MspDeInit 1 */
+} 
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

Src/dma.c

@@ -0,0 +1,76 @@
+/**
+  ******************************************************************************
+  * File Name          : dma.c
+  * Description        : This file provides code for the configuration
+  *                      of all the requested memory to memory DMA transfers.
+  ******************************************************************************
+  *
+  * COPYRIGHT(c) 2016 STMicroelectronics
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+/* Includes ------------------------------------------------------------------*/
+#include "dma.h"
+
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+/*----------------------------------------------------------------------------*/
+/* Configure DMA                                                              */
+/*----------------------------------------------------------------------------*/
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+
+/** 
+  * Enable DMA controller clock
+  */
+void MX_DMA_Init(void) 
+{
+  /* DMA controller clock enable */
+  __HAL_RCC_DMA1_CLK_ENABLE();
+
+  /* DMA interrupt init */
+  /* DMA1_Channel1_IRQn interrupt configuration */
+  HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);
+  HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);
+
+}
+
+/* USER CODE BEGIN 2 */
+
+/* USER CODE END 2 */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

Src/gpio.c

@@ -0,0 +1,115 @@
+/**
+  ******************************************************************************
+  * File Name          : gpio.c
+  * Description        : This file provides code for the configuration
+  *                      of all used GPIO pins.
+  ******************************************************************************
+  *
+  * COPYRIGHT(c) 2016 STMicroelectronics
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "gpio.h"
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+/*----------------------------------------------------------------------------*/
+/* Configure GPIO                                                             */
+/*----------------------------------------------------------------------------*/
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+
+/** Configure pins as 
+        * Analog 
+        * Input 
+        * Output
+        * EVENT_OUT
+        * EXTI
+*/
+void MX_GPIO_Init(void)
+{
+
+  GPIO_InitTypeDef GPIO_InitStruct;
+
+  /* GPIO Ports Clock Enable */
+  __HAL_RCC_GPIOE_CLK_ENABLE();
+  __HAL_RCC_GPIOA_CLK_ENABLE();
+  __HAL_RCC_GPIOB_CLK_ENABLE();
+  __HAL_RCC_GPIOD_CLK_ENABLE();
+
+  /*Configure GPIO pin Output Level */
+  HAL_GPIO_WritePin(GPIOE, SPI1_CS_Pin|LED4_Pin|LED3_Pin, GPIO_PIN_RESET);
+
+  /*Configure GPIO pin Output Level */
+  HAL_GPIO_WritePin(AUDIO_NSTBY_GPIO_Port, AUDIO_NSTBY_Pin, GPIO_PIN_RESET);
+
+  /*Configure GPIO pin Output Level */
+  HAL_GPIO_WritePin(GPIOD, LED2_Pin|LED1_Pin, GPIO_PIN_RESET);
+
+  /*Configure GPIO pins : PEPin PEPin PEPin */
+  GPIO_InitStruct.Pin = SPI1_CS_Pin|LED4_Pin|LED3_Pin;
+  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
+  HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
+
+  /*Configure GPIO pin : PtPin */
+  GPIO_InitStruct.Pin = AUDIO_NSTBY_Pin;
+  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
+  HAL_GPIO_Init(AUDIO_NSTBY_GPIO_Port, &GPIO_InitStruct);
+
+  /*Configure GPIO pins : PEPin PEPin PEPin PEPin 
+                           PEPin */
+  GPIO_InitStruct.Pin = BTN_UP_Pin|BTN_DN_Pin|BTN_L_Pin|BTN_R_Pin 
+                          |BTN_CE_Pin;
+  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
+  GPIO_InitStruct.Pull = GPIO_NOPULL;
+  HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
+
+  /*Configure GPIO pins : PDPin PDPin */
+  GPIO_InitStruct.Pin = LED2_Pin|LED1_Pin;
+  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
+  HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
+
+}
+
+/* USER CODE BEGIN 2 */
+
+/* USER CODE END 2 */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

Src/main.c

@@ -0,0 +1,244 @@
+/**
+  ******************************************************************************
+  * File Name          : main.c
+  * Description        : Main program body
+  ******************************************************************************
+  *
+  * COPYRIGHT(c) 2016 STMicroelectronics
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+/* Includes ------------------------------------------------------------------*/
+#include <inttypes.h>
+#include "stm32f1xx_hal.h"
+#include "adc.h"
+#include "dma.h"
+#include "spi.h"
+#include "tim.h"
+#include "usart.h"
+#include "gpio.h"
+
+/* USER CODE BEGIN Includes */
+#include "utils.h"
+
+/* USER CODE END Includes */
+
+/* Private variables ---------------------------------------------------------*/
+
+/* USER CODE BEGIN PV */
+/* Private variables ---------------------------------------------------------*/
+
+/* USER CODE END PV */
+
+/* Private function prototypes -----------------------------------------------*/
+void SystemClock_Config(void);
+void Error_Handler(void);
+
+/* USER CODE BEGIN PFP */
+/* Private function prototypes -----------------------------------------------*/
+
+
+/* USER CODE END PFP */
+
+/* USER CODE BEGIN 0 */
+
+static uint32_t audio_samples[256];
+
+void start_DMA() {
+	uart_print("- Starting ADC DMA\n");
+
+	HAL_ADC_Start_DMA(&hadc1, audio_samples, 256);
+	HAL_TIM_Base_Start(&htim3);
+}
+
+/** This callback is called by HAL after the transfer is complete */
+void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
+{
+	uart_print("- DMA complete.\n");
+
+	char x[100];
+	sprintf(x, "%"PRIu32"\n", audio_samples[0]);
+	uart_print(x);
+}
+
+/* USER CODE END 0 */
+
+int main(void)
+{
+
+  /* USER CODE BEGIN 1 */
+
+  /* USER CODE END 1 */
+
+  /* MCU Configuration----------------------------------------------------------*/
+
+  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
+  HAL_Init();
+
+  /* Configure the system clock */
+  SystemClock_Config();
+
+  /* Initialize all configured peripherals */
+  MX_GPIO_Init();
+  MX_DMA_Init();
+  MX_ADC1_Init();
+  MX_SPI1_Init();
+  MX_TIM3_Init();
+  MX_USART1_UART_Init();
+
+  /* USER CODE BEGIN 2 */
+
+	// Leds OFF
+	HAL_GPIO_WritePin(LED1_GPIO_Port, LED1_Pin, 1);
+	HAL_GPIO_WritePin(LED2_GPIO_Port, LED2_Pin, 1);
+	HAL_GPIO_WritePin(LED3_GPIO_Port, LED3_Pin, 1);
+	HAL_GPIO_WritePin(LED4_GPIO_Port, LED4_Pin, 1);
+
+	// Enable audio input
+	HAL_GPIO_WritePin(AUDIO_NSTBY_GPIO_Port, AUDIO_NSTBY_Pin, 1);
+
+
+  /* USER CODE END 2 */
+
+  /* Infinite loop */
+  /* USER CODE BEGIN WHILE */
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wmissing-noreturn"
+	while (1) {
+  /* USER CODE END WHILE */
+
+  /* USER CODE BEGIN 3 */
+
+		// Blink
+		HAL_GPIO_TogglePin(LED1_GPIO_Port, LED1_Pin);
+		HAL_Delay(500);
+
+		uart_print("Main loop\n");
+		start_DMA();
+	}
+#pragma clang diagnostic pop
+  /* USER CODE END 3 */
+
+}
+
+/** System Clock Configuration
+*/
+void SystemClock_Config(void)
+{
+
+  RCC_OscInitTypeDef RCC_OscInitStruct;
+  RCC_ClkInitTypeDef RCC_ClkInitStruct;
+  RCC_PeriphCLKInitTypeDef PeriphClkInit;
+
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
+  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
+  RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV5;
+  RCC_OscInitStruct.Prediv1Source = RCC_PREDIV1_SOURCE_PLL2;
+  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
+  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
+  RCC_OscInitStruct.PLL2.PLL2State = RCC_PLL2_ON;
+  RCC_OscInitStruct.PLL2.PLL2MUL = RCC_PLL2_MUL8;
+  RCC_OscInitStruct.PLL2.HSEPrediv2Value = RCC_HSE_PREDIV2_DIV5;
+  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
+  {
+    Error_Handler();
+  }
+
+  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
+                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
+  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
+  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
+  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
+  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
+  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
+  {
+    Error_Handler();
+  }
+
+  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC;
+  PeriphClkInit.AdcClockSelection = RCC_ADCPCLK2_DIV6;
+  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
+  {
+    Error_Handler();
+  }
+
+  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
+
+  HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
+
+  __HAL_RCC_PLLI2S_ENABLE();
+
+  /* SysTick_IRQn interrupt configuration */
+  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
+}
+
+/* USER CODE BEGIN 4 */
+
+/* USER CODE END 4 */
+
+/**
+  * @brief  This function is executed in case of error occurrence.
+  * @param  None
+  * @retval None
+  */
+void Error_Handler(void)
+{
+  /* USER CODE BEGIN Error_Handler */
+	/* User can add his own implementation to report the HAL error return state */
+	while (1) {
+	}
+  /* USER CODE END Error_Handler */ 
+}
+
+#ifdef USE_FULL_ASSERT
+
+/**
+   * @brief Reports the name of the source file and the source line number
+   * where the assert_param error has occurred.
+   * @param file: pointer to the source file name
+   * @param line: assert_param error line source number
+   * @retval None
+   */
+void assert_failed(uint8_t* file, uint32_t line)
+{
+  /* USER CODE BEGIN 6 */
+  /* User can add his own implementation to report the file name and line number,
+	ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
+  /* USER CODE END 6 */
+
+}
+
+#endif
+
+/**
+  * @}
+  */ 
+
+/**
+  * @}
+*/ 
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

Src/spi.c

@@ -0,0 +1,131 @@
+/**
+  ******************************************************************************
+  * File Name          : SPI.c
+  * Description        : This file provides code for the configuration
+  *                      of the SPI instances.
+  ******************************************************************************
+  *
+  * COPYRIGHT(c) 2016 STMicroelectronics
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "spi.h"
+
+#include "gpio.h"
+
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+SPI_HandleTypeDef hspi1;
+
+/* SPI1 init function */
+void MX_SPI1_Init(void)
+{
+
+  hspi1.Instance = SPI1;
+  hspi1.Init.Mode = SPI_MODE_MASTER;
+  hspi1.Init.Direction = SPI_DIRECTION_2LINES;
+  hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
+  hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
+  hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
+  hspi1.Init.NSS = SPI_NSS_SOFT;
+  hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_4;
+  hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
+  hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
+  hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
+  hspi1.Init.CRCPolynomial = 10;
+  if (HAL_SPI_Init(&hspi1) != HAL_OK)
+  {
+    Error_Handler();
+  }
+
+}
+
+void HAL_SPI_MspInit(SPI_HandleTypeDef* spiHandle)
+{
+
+  GPIO_InitTypeDef GPIO_InitStruct;
+  if(spiHandle->Instance==SPI1)
+  {
+  /* USER CODE BEGIN SPI1_MspInit 0 */
+
+  /* USER CODE END SPI1_MspInit 0 */
+    /* Peripheral clock enable */
+    __HAL_RCC_SPI1_CLK_ENABLE();
+  
+    /**SPI1 GPIO Configuration    
+    PA5     ------> SPI1_SCK
+    PA7     ------> SPI1_MOSI 
+    */
+    GPIO_InitStruct.Pin = GPIO_PIN_5|GPIO_PIN_7;
+    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
+    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+  /* USER CODE BEGIN SPI1_MspInit 1 */
+
+  /* USER CODE END SPI1_MspInit 1 */
+  }
+}
+
+void HAL_SPI_MspDeInit(SPI_HandleTypeDef* spiHandle)
+{
+
+  if(spiHandle->Instance==SPI1)
+  {
+  /* USER CODE BEGIN SPI1_MspDeInit 0 */
+
+  /* USER CODE END SPI1_MspDeInit 0 */
+    /* Peripheral clock disable */
+    __HAL_RCC_SPI1_CLK_DISABLE();
+  
+    /**SPI1 GPIO Configuration    
+    PA5     ------> SPI1_SCK
+    PA7     ------> SPI1_MOSI 
+    */
+    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_5|GPIO_PIN_7);
+
+  }
+  /* USER CODE BEGIN SPI1_MspDeInit 1 */
+
+  /* USER CODE END SPI1_MspDeInit 1 */
+} 
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

Src/stm32f1xx_hal_msp.c

@@ -0,0 +1,92 @@
+/**
+  ******************************************************************************
+  * File Name          : stm32f1xx_hal_msp.c
+  * Description        : This file provides code for the MSP Initialization 
+  *                      and de-Initialization codes.
+  ******************************************************************************
+  *
+  * COPYRIGHT(c) 2016 STMicroelectronics
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f1xx_hal.h"
+
+extern void Error_Handler(void);
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+/**
+  * Initializes the Global MSP.
+  */
+void HAL_MspInit(void)
+{
+  /* USER CODE BEGIN MspInit 0 */
+
+  /* USER CODE END MspInit 0 */
+
+  __HAL_RCC_AFIO_CLK_ENABLE();
+
+  HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);
+
+  /* System interrupt init*/
+  /* MemoryManagement_IRQn interrupt configuration */
+  HAL_NVIC_SetPriority(MemoryManagement_IRQn, 0, 0);
+  /* BusFault_IRQn interrupt configuration */
+  HAL_NVIC_SetPriority(BusFault_IRQn, 0, 0);
+  /* UsageFault_IRQn interrupt configuration */
+  HAL_NVIC_SetPriority(UsageFault_IRQn, 0, 0);
+  /* SVCall_IRQn interrupt configuration */
+  HAL_NVIC_SetPriority(SVCall_IRQn, 0, 0);
+  /* DebugMonitor_IRQn interrupt configuration */
+  HAL_NVIC_SetPriority(DebugMonitor_IRQn, 0, 0);
+  /* PendSV_IRQn interrupt configuration */
+  HAL_NVIC_SetPriority(PendSV_IRQn, 0, 0);
+  /* SysTick_IRQn interrupt configuration */
+  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
+
+    /**DISABLE: JTAG-DP Disabled and SW-DP Disabled 
+    */
+  __HAL_AFIO_REMAP_SWJ_DISABLE();
+
+  /* USER CODE BEGIN MspInit 1 */
+
+  /* USER CODE END MspInit 1 */
+}
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

Src/stm32f1xx_it.c

@@ -0,0 +1,204 @@
+/**
+  ******************************************************************************
+  * @file    stm32f1xx_it.c
+  * @brief   Interrupt Service Routines.
+  ******************************************************************************
+  *
+  * COPYRIGHT(c) 2016 STMicroelectronics
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f1xx_hal.h"
+#include "stm32f1xx.h"
+#include "stm32f1xx_it.h"
+
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+/* External variables --------------------------------------------------------*/
+extern DMA_HandleTypeDef hdma_adc1;
+
+/******************************************************************************/
+/*            Cortex-M3 Processor Interruption and Exception Handlers         */ 
+/******************************************************************************/
+
+/**
+* @brief This function handles Non maskable interrupt.
+*/
+void NMI_Handler(void)
+{
+  /* USER CODE BEGIN NonMaskableInt_IRQn 0 */
+
+  /* USER CODE END NonMaskableInt_IRQn 0 */
+  /* USER CODE BEGIN NonMaskableInt_IRQn 1 */
+
+  /* USER CODE END NonMaskableInt_IRQn 1 */
+}
+
+/**
+* @brief This function handles Hard fault interrupt.
+*/
+void HardFault_Handler(void)
+{
+  /* USER CODE BEGIN HardFault_IRQn 0 */
+
+  /* USER CODE END HardFault_IRQn 0 */
+  while (1)
+  {
+  }
+  /* USER CODE BEGIN HardFault_IRQn 1 */
+
+  /* USER CODE END HardFault_IRQn 1 */
+}
+
+/**
+* @brief This function handles Memory management fault.
+*/
+void MemManage_Handler(void)
+{
+  /* USER CODE BEGIN MemoryManagement_IRQn 0 */
+
+  /* USER CODE END MemoryManagement_IRQn 0 */
+  while (1)
+  {
+  }
+  /* USER CODE BEGIN MemoryManagement_IRQn 1 */
+
+  /* USER CODE END MemoryManagement_IRQn 1 */
+}
+
+/**
+* @brief This function handles Prefetch fault, memory access fault.
+*/
+void BusFault_Handler(void)
+{
+  /* USER CODE BEGIN BusFault_IRQn 0 */
+
+  /* USER CODE END BusFault_IRQn 0 */
+  while (1)
+  {
+  }
+  /* USER CODE BEGIN BusFault_IRQn 1 */
+
+  /* USER CODE END BusFault_IRQn 1 */
+}
+
+/**
+* @brief This function handles Undefined instruction or illegal state.
+*/
+void UsageFault_Handler(void)
+{
+  /* USER CODE BEGIN UsageFault_IRQn 0 */
+
+  /* USER CODE END UsageFault_IRQn 0 */
+  while (1)
+  {
+  }
+  /* USER CODE BEGIN UsageFault_IRQn 1 */
+
+  /* USER CODE END UsageFault_IRQn 1 */
+}
+
+/**
+* @brief This function handles System service call via SWI instruction.
+*/
+void SVC_Handler(void)
+{
+  /* USER CODE BEGIN SVCall_IRQn 0 */
+
+  /* USER CODE END SVCall_IRQn 0 */
+  /* USER CODE BEGIN SVCall_IRQn 1 */
+
+  /* USER CODE END SVCall_IRQn 1 */
+}
+
+/**
+* @brief This function handles Debug monitor.
+*/
+void DebugMon_Handler(void)
+{
+  /* USER CODE BEGIN DebugMonitor_IRQn 0 */
+
+  /* USER CODE END DebugMonitor_IRQn 0 */
+  /* USER CODE BEGIN DebugMonitor_IRQn 1 */
+
+  /* USER CODE END DebugMonitor_IRQn 1 */
+}
+
+/**
+* @brief This function handles Pendable request for system service.
+*/
+void PendSV_Handler(void)
+{
+  /* USER CODE BEGIN PendSV_IRQn 0 */
+
+  /* USER CODE END PendSV_IRQn 0 */
+  /* USER CODE BEGIN PendSV_IRQn 1 */
+
+  /* USER CODE END PendSV_IRQn 1 */
+}
+
+/**
+* @brief This function handles System tick timer.
+*/
+void SysTick_Handler(void)
+{
+  /* USER CODE BEGIN SysTick_IRQn 0 */
+
+  /* USER CODE END SysTick_IRQn 0 */
+  HAL_IncTick();
+  HAL_SYSTICK_IRQHandler();
+  /* USER CODE BEGIN SysTick_IRQn 1 */
+
+  /* USER CODE END SysTick_IRQn 1 */
+}
+
+/******************************************************************************/
+/* STM32F1xx Peripheral Interrupt Handlers                                    */
+/* Add here the Interrupt Handlers for the used peripherals.                  */
+/* For the available peripheral interrupt handler names,                      */
+/* please refer to the startup file (startup_stm32f1xx.s).                    */
+/******************************************************************************/
+
+/**
+* @brief This function handles DMA1 channel1 global interrupt.
+*/
+void DMA1_Channel1_IRQHandler(void)
+{
+  /* USER CODE BEGIN DMA1_Channel1_IRQn 0 */
+
+  /* USER CODE END DMA1_Channel1_IRQn 0 */
+  HAL_DMA_IRQHandler(&hdma_adc1);
+  /* USER CODE BEGIN DMA1_Channel1_IRQn 1 */
+
+  /* USER CODE END DMA1_Channel1_IRQn 1 */
+}
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

Src/syscalls.c

@@ -0,0 +1,32 @@
+#include <errno.h>
+#include <stdio.h>
+
+register char * stack_ptr asm("sp");
+
+caddr_t _sbrk(int incr)
+{
+	extern char end __asm("end");
+	static char *heap_end;
+	char *prev_heap_end;
+
+	if (heap_end == 0)
+		heap_end = &end;
+
+	prev_heap_end = heap_end;
+	if (heap_end + incr > stack_ptr)
+	{
+//		write(1, "Heap and stack collision\n", 25);
+//		abort();
+		errno = ENOMEM;
+		return (caddr_t) -1;
+	}
+
+	heap_end += incr;
+
+	return (caddr_t) prev_heap_end;
+}
+
+
+// Other systcalls are defined in
+// - com/com_fileio.c
+// - hw_utils/reset.h

Src/tim.c

@@ -0,0 +1,122 @@
+/**
+  ******************************************************************************
+  * File Name          : TIM.c
+  * Description        : This file provides code for the configuration
+  *                      of the TIM instances.
+  ******************************************************************************
+  *
+  * COPYRIGHT(c) 2016 STMicroelectronics
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "tim.h"
+
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+TIM_HandleTypeDef htim3;
+
+/* TIM3 init function */
+void MX_TIM3_Init(void)
+{
+  TIM_MasterConfigTypeDef sMasterConfig;
+  TIM_OC_InitTypeDef sConfigOC;
+
+  htim3.Instance = TIM3;
+  htim3.Init.Prescaler = 0;
+  htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
+  htim3.Init.Period = 1800;
+  htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
+  if (HAL_TIM_OC_Init(&htim3) != HAL_OK)
+  {
+    Error_Handler();
+  }
+
+  sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;
+  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
+  if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL_OK)
+  {
+    Error_Handler();
+  }
+
+  sConfigOC.OCMode = TIM_OCMODE_TIMING;
+  sConfigOC.Pulse = 0;
+  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
+  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
+  if (HAL_TIM_OC_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
+  {
+    Error_Handler();
+  }
+
+}
+
+void HAL_TIM_OC_MspInit(TIM_HandleTypeDef* tim_ocHandle)
+{
+
+  if(tim_ocHandle->Instance==TIM3)
+  {
+  /* USER CODE BEGIN TIM3_MspInit 0 */
+
+  /* USER CODE END TIM3_MspInit 0 */
+    /* Peripheral clock enable */
+    __HAL_RCC_TIM3_CLK_ENABLE();
+  /* USER CODE BEGIN TIM3_MspInit 1 */
+
+  /* USER CODE END TIM3_MspInit 1 */
+  }
+}
+
+void HAL_TIM_OC_MspDeInit(TIM_HandleTypeDef* tim_ocHandle)
+{
+
+  if(tim_ocHandle->Instance==TIM3)
+  {
+  /* USER CODE BEGIN TIM3_MspDeInit 0 */
+
+  /* USER CODE END TIM3_MspDeInit 0 */
+    /* Peripheral clock disable */
+    __HAL_RCC_TIM3_CLK_DISABLE();
+  }
+  /* USER CODE BEGIN TIM3_MspDeInit 1 */
+
+  /* USER CODE END TIM3_MspDeInit 1 */
+} 
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

Src/usart.c

@@ -0,0 +1,135 @@
+/**
+  ******************************************************************************
+  * File Name          : USART.c
+  * Description        : This file provides code for the configuration
+  *                      of the USART instances.
+  ******************************************************************************
+  *
+  * COPYRIGHT(c) 2016 STMicroelectronics
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "usart.h"
+
+#include "gpio.h"
+
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+UART_HandleTypeDef huart1;
+
+/* USART1 init function */
+
+void MX_USART1_UART_Init(void)
+{
+
+  huart1.Instance = USART1;
+  huart1.Init.BaudRate = 115200;
+  huart1.Init.WordLength = UART_WORDLENGTH_8B;
+  huart1.Init.StopBits = UART_STOPBITS_1;
+  huart1.Init.Parity = UART_PARITY_NONE;
+  huart1.Init.Mode = UART_MODE_TX_RX;
+  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
+  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
+  if (HAL_UART_Init(&huart1) != HAL_OK)
+  {
+    Error_Handler();
+  }
+
+}
+
+void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
+{
+
+  GPIO_InitTypeDef GPIO_InitStruct;
+  if(uartHandle->Instance==USART1)
+  {
+  /* USER CODE BEGIN USART1_MspInit 0 */
+
+  /* USER CODE END USART1_MspInit 0 */
+    /* Peripheral clock enable */
+    __HAL_RCC_USART1_CLK_ENABLE();
+  
+    /**USART1 GPIO Configuration    
+    PB6     ------> USART1_TX
+    PB7     ------> USART1_RX 
+    */
+    GPIO_InitStruct.Pin = GPIO_PIN_6;
+    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
+    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
+
+    GPIO_InitStruct.Pin = GPIO_PIN_7;
+    GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
+    GPIO_InitStruct.Pull = GPIO_NOPULL;
+    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
+
+    __HAL_AFIO_REMAP_USART1_ENABLE();
+
+  /* USER CODE BEGIN USART1_MspInit 1 */
+
+  /* USER CODE END USART1_MspInit 1 */
+  }
+}
+
+void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
+{
+
+  if(uartHandle->Instance==USART1)
+  {
+  /* USER CODE BEGIN USART1_MspDeInit 0 */
+
+  /* USER CODE END USART1_MspDeInit 0 */
+    /* Peripheral clock disable */
+    __HAL_RCC_USART1_CLK_DISABLE();
+  
+    /**USART1 GPIO Configuration    
+    PB6     ------> USART1_TX
+    PB7     ------> USART1_RX 
+    */
+    HAL_GPIO_DeInit(GPIOB, GPIO_PIN_6|GPIO_PIN_7);
+
+  }
+  /* USER CODE BEGIN USART1_MspDeInit 1 */
+
+  /* USER CODE END USART1_MspDeInit 1 */
+} 
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

Src/utils.c

@@ -0,0 +1,19 @@
+//
+// Created by MightyPork on 2.9.16.
+//
+
+#include <string.h>
+#include "stm32f1xx_hal_conf.h"
+#include "adc.h"
+#include "tim.h"
+#include "usart.h"
+#include "utils.h"
+
+void uart_print(const char *string)
+{
+	HAL_UART_Transmit(&huart1, (char*)string, (uint16_t) strlen(string), 10);
+
+	// Stop ADC and the timer
+	HAL_ADC_Stop(&hadc1);
+	HAL_TIM_Base_Stop(&htim3);
+}